We have demonstrated the advantages of combining the SDSS optical and UKIDSS, WISE infrared photometric
data in finding quasars. However, in order to fully use this advantage to discover more quasars we still need much wider and deeper photometry in the
optical and infrared bands.
Fortunately, several ongoing and upcoming photometric sky surveys will provide such
helps to us. SDSS III [1]} has taken 2500 deg\(^2\) 
further imaging in \(ugriz\)  bands
in the south galactic cap aside from the SDSS I and II photometry. The SkyMapper [2]} and Dark Energy Survey [3]} will also present the multi-band optical
photometry in 20000/5000 deg\(^2\)  of the southern sky, reaching the magnitude limit of 22/24 mag in the \(i\) -band,
respectively. The Visible and Infrared Survey Telescope for Astronomy (VISTA)[4]} will
carry out its
VISTA Hemisphere Survey in the near-IR YJHK bands for 20000 deg\(^2\)  of the southern sky with
a magnitude limit at K=20.0, which is about 5 mag and 2 mag deeper than the 2MASS
and UKIDSS limits, respectively. Therefore, the WISE data, when combined with the optical and infrared photometric data
obtained with these ongoing and upcoming surveys, will provide us with a large database for quasar candidate selections using the proposed optical/infrared selection criteria.
We expect that a much larger and more complete quasar sample covering a wider range of
redshift will be constructed in the near future, which will play an important role in the near future
in studying extragalactic astrophysics, including AGN physics, galaxy
evolution, large scale structure and cosmology.
